MAGNETIC DOOR SENSOR

Magnetic Lock Sensor

Rs 141.60

This sensor is essentially a reed switch, encased in a plastic shell. Normally the reed switch is 'open' (no connection between the two wires). The other half is a magnet. When the magnet is less than 13mm (0.5") away, the reed switch closes. They're often used to detect when a door is open, which is why they have mounting tabs and screws.